Apparatus foe



3 Sheets-Sheet 1. G. S. G. SPENCE.

Hot Air Furnace.

N0. 24,590. Patented June-28, 1859..

E 3 Sheets-Sheet 2.

G. S. G. SPENCE.

Hot Air Furnace Patented June 28, 1859.

N, PETERS. Pholu Lvthog 3 Sheets-Sheet 3.

, G. S. G. SPENCE.

Hot Air Furnace.

No. 24.590. v 4 Patentedlun'e 28,1859.

UNITED STATES PATEN T OFFICE.

GEO. S. G. SPENCE, OF BOSTON, MASSACHUSETTS.

APPARATUS FOR HEATING BUILDINGS.

Specification of Letters Patent No. 24,590, dated June 28, 1859.

To all whom it may concern:

Be it known that I, GEORGE S. G. SPENCE, of Boston, in the county ofSuffolk and State of Massachusetts, have invented an Improved Apparatusfor Heating Buildings by Hot \Vater and Steam as Auxiliary Thereto; andI do hereby declare that the same is fully described and represented inthe following specification and the accompanying drawings, of whichFigure 1, is a top view; Fig. 2, a front elevation; Fig. 8, a sideelevation; Fig. 4, a horizontal section, Fig. 5, a vertical andtransverse section and, Fig. 6, a vertical and longitudinal section ofit.

The nature of the invention consists in the peculiar form of the boiler;first, having a large horizontal surface below to receive heat from thefuel chamber, and on its upper surface to discharge into the dischargehot air pipe; second, having in its vertical part an internal andexternal radiating surface for heating the cold air passing over thesame.

In such drawings, A, denotes the outer case, which may be constructed ofmetal or brickwork and so as to form a chamber, B, for the reception ofthe air and heat radiating apparatus to be hereinafter described.

A boiler, C, with its fire place, D, and ash pit, E, are arranged withinthe chamber, B, as shown in the drawings, particularly in Figs. 5 and 6,thereof, the external surface of the fire-place and the smoke chamber,E, as well as that of the smoke discharge pipe F, being so arranged asto radiate heat into the chamber, B, while the boiler is heated by thefire on the fire place and also radiates heat into such chamber.

The boiler, C, is an upright vessel, constructed with its opposite sidesparallel and with an air chamber, G, recessed in it or extending downvertically into it, as shown in Figs. 4, 5, and 6, such air chamberbeing openat top to receive a hot air concentrator and deflector, H,which is a metallic box projecting downward from the top of the case, A,and made open at bottom and so arranged in the air chamber, G, andconnected with one or more air discharge flues, I, I, as to cause airfrom the chamber, B, while the apparatus is in use to pass down betweensuch deflector and the sides of the chamber, G, and from thence into thedeflector where it will be concentrated and delivered into the escapepipes to be distributed by them to the difierent apartments to bewarmed.

Arranged on each side of the boiler, C, and so that there may be an airspace, L, or, L, between it and the boiler is a thin vertical auxiliaryheater, K, or, K, which extends somewhat above the boiler and isconnected with it by a series of horizontal bent pipes at, a, a, whichnot only open communication with the boiler and heater but serve tosupport the latter in place. F urthermore, a horizontal pipe, 6,connects the auxiliary heaters, K, K, at their tops and is connectedwith the boiler by a vertical pipe, 0.

Steam and water trial cocks as, y, may lead from the steam and waterspaces of one of the auxiliary heaters so as to enable a person toascertain at any time whether or not there is sufficient water in theboiler.

Besides being able to heat apartments by hot air distributed throughpipes leading from the concentrator, my apparatus is also calculated toheat by means of steam carried through pipes and radiators. The drawingsshow at w, the carrying steam pipe. They also show at o, the return pipeor that which takes back to the boiler the steam which may be condensedin the leading pipes and radiators. The pipe to, extends to a radiatora, from which, the pipe, '0, leads to the boiler or one of the lowerpipes thereof.

From the above, it will be seen that my said apparatus combines theadvantages of a common hot air furnace, a hot water heat ing apparatus,and a steam heater. By means of it, I can not only heat pure air takenfrom the outside of a building, but introduce such air into a room fromthe hot air chamber of the apparatus, and should not such air besufficiently warm, I can add to its heat when in the room by supplyingit with more heat by the steam heating pipes or apparatus which may bein such room and be connected with the boiler. I also can heat the loweror nearer part or parts of a house by the hot air pipes and supply heatto more distant parts by means of the steam distribution pipes.

In the operation of the said heating apparatus, cold air is to be ledinto the lower part of the chamber, B. By circulating within suchchamber it becomes heated, by the caloric radiated from the externalsurfaces of the boiler, the fire-place and smoke flue. It will rise inthe said chamber and the boiler, in combination with the pipe H or itsequivalent, depressed Within the same for heating and distributing theair in the manner and for the purpose set forth. 15

In testimony whereof I have hereunto set my signature.

' GEO. S. G. SPENOE.

Witnesses R. H. EDDY, I P. HALE, Jr.

